[MSBuild]::MakeRelative fails with "Invalid URI: The hostname could not be parsed." when using opening from WSL2

[rlabrecque]

Issue Description

When you have a VS2019 C# project inside a WSL2 container and try to open it, you can end up with this error:

\\wsl$\Debian\home\user\Redacted\Redacted.csproj : error  :
The expression "[MSBuild]::MakeRelative(\\wsl$\Debian\home\user\Redacted, \\wsl$\Debian\home\user\Redacted\obj\project.assets.json)" cannot be evaluated.
Invalid URI: The hostname could not be parsed.
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\MSBuild\Microsoft\NuGet\16.0\Microsoft.NuGet.targets

Note: This might be a problem with UNC paths in general, or may be the damn dollar sign in \wsl$, haven't dug that far into it.

Versions & Configurations

Windows 10H2
WSL2
Visual Studio 2019 Version 16.9.2

[danmoseley]

See dotnet/runtime#36595

[rlabrecque]

Perfect, thanks. I believe I have seen the WSL2 team also mentioning a switch away from \wsl$\ elsewhere as well, that would be the ideal solution to all of this.

Feel free to close this if you want, there should be enough info here for the next person to search for this ticket.

[danmoseley]

It's not my repo, but since the issue is in my repo, I will be bold and close this..